Norwich manager Paul Lambert told the Canaries' website: "He's got excellent connections throughout Britain and Europe, which will be a real plus."
As well as his time in Scotland, Chester also had a brief spell with Premier League side Fulham.
Norwich chief executive David McNally added: "The role of the chief scout at any top-class football club is becoming ever more vital and in Ewan we have been able to recruit one of the very best in European football."
Source: BBC Sport
Source: BBC Sport